Mycobacterium abscessus
SusceptibilityIn Vitro Activity of New Tetracycline Analogs Omadacycline and Eravacycline against Drug-Resistant Clinical Isolates of Mycobacterium abscessusTigecycline is used in multidrug regimens for salvage therapy of Mycobacterium abscessus infections but is often poorly tolerated and has no oral formulation. Here, we report similar in vitro activity of two newly approved tetracycline analogs, omadacycline and eravacycline, against 28 drug-resistant clinical isolates of...
SusceptibilitySelect β-Lactam Combinations Exhibit Synergy against Mycobacterium abscessus In VitroMycobacterium abscessus is a nontuberculous mycobacterium that causes invasive pulmonary infections in patients with structural lung disease. M. abscessus is intrinsically resistant to several classes of antibiotics, and an increasing number of strains isolated from patients exhibit resistance to...
Mechanisms of Action: Physiological EffectsIn Vitro and Intracellular Activity of Imipenem Combined with Tedizolid, Rifabutin, and Avibactam against Mycobacterium abscessusMycobacterium abscessus infections are difficult to treat because of their resistance to many antibiotics. In vitro, tedizolid combined with imipenem displayed a moderate synergistic effect (fractional inhibitory concentration index, 0.41) but no bactericidal activity.
SusceptibilityIn Vitro Synergism of Rifabutin with Clarithromycin, Imipenem, and Tigecycline against the Mycobacterium abscessus ComplexInfections caused by the difficult-to-treat bacterium Mycobacterium abscessus are increasing in frequency. Rifabutin, in contrast to rifampin, appears to be active in vitro against M. abscessus, especially against clarithromycin-resistant strains.
SusceptibilityIn Vitro Activity of the New β-Lactamase Inhibitors Relebactam and Vaborbactam in Combination with β-Lactams against Mycobacterium abscessus Complex Clinical IsolatesPulmonary disease due to infection with Mycobacterium abscessus complex (MABC) is notoriously difficult to treat, in large part due to the intrinsic resistance of MABC strains to most antibiotics, including β-lactams. MABC organisms express a broad-spectrum β-lactamase that is resistant to traditional β-lactam-based β-lactamase inhibitors but inhibited by a newer non-...
Experimental TherapeuticsRufomycin Targets ClpC1 Proteolysis in Mycobacterium tuberculosis and M. abscessusClpC1 is an emerging new target for the treatment of Mycobacterium tuberculosis infections, and several cyclic peptides (ecumicin, cyclomarin A, and lassomycin) are known to act on this target. This study identified another group of peptides, the rufomycins (RUFs), as bactericidal to M. tuberculosis...
Chemistry; BiosynthesisIndole-2-Carboxamides Are Active against Mycobacterium abscessus in a Mouse Model of Acute InfectionNontuberculous mycobacteria (NTM) pathogens particularly infect patients with structural lung disorders. We previously reported novel indole-2-carboxamides (ICs) that are active against a wide panel of NTM pathogens.
Mechanisms of ResistanceMolecular Analysis of Linezolid-Resistant Clinical Isolates of Mycobacterium abscessusA total of 194 Mycobacterium abscessus isolates were collected from patients, and the whole genomes were sequenced. Eighty-five (43.8%) isolates showed linezolid (LZD) resistance.
Mechanisms of ResistanceMutations in the MAB_2299c TetR Regulator Confer Cross-Resistance to Clofazimine and Bedaquiline in Mycobacterium abscessusNew therapeutic approaches are needed against Mycobacterium abscessus, a respiratory mycobacterial pathogen that evades efforts to successfully treat infected patients. Clofazimine and bedaquiline, two drugs used for the treatment of multidrug-resistant tuberculosis, are being considered as alternatives for the treatment of lung diseases caused by...
Editor's Pick Mechanisms of ResistanceGenetic Correlation of Antibiotic Susceptibility and Resistance Genotyping for the Mycobacterium abscessus GroupTreatment efficacy of Mycobacterium abscessus infections depends on bacterial genotype. Here, the relationship between genotype, as determined by sequence analysis, and antibiotic resistance phenotype was analyzed.